Iran, facing another virus surge, reimposes restrictions and focuses on homegrown vaccines

Iran on Sunday reimposed coronavirus restrictions amid fears that a fifth wave of the virus driven by the delta variant could overrun the country’s health-care system, already battered by U.S. sanctions and the region’s worst cycle of outbreaks. The latest surge comes as Iran has struggled to import vaccines, prompting the country’s leaders to double down on researching and developing its homegrown vaccines.